But even if you give them opportunity for that, what most of them do is to mess up - 2015 price of 1 BTC was even below $200, two years later $20 000 and how many of us get rich after that?
There are actually quite a few people that bought in 2015 and sold in 2017 at all time high of $20000. Some of these people got "rich" but the majority of them are people like myself who made a good amount of profit but not millionaire. It took real guts to invest in 2015 when market was in bear mode so it is rather amusing to see all these comments saying they would have bought in 2015 because I know for a fact that 99% of them would have backed away from such a risky investment especially at a time when crypto's future was in doubt.